Improvement in automatic press-screws



BM. IVENS. Automatic-Press Screw.

No. 213,334. Patented Mar. 18, 1879.

FIEr l ATTOR N EY N. PETERS. PHOTO-LITHQGRAFMER. WASNINGTON u c UNITED STATES PATENT OFFICE.

EDMUND M. IVENS, OF NEW ORLEANS, LOUISIANA, ASSIGNOR TO EMILY L. IVENS, OF SAME PLACE.

IMPROVEMENT IN AUTO MATIC PRESS-SCREWS.

Specification forming part of Letters Patent No. 213,334, dated March 18, 1879,- application filed May 20, 1878.

latter so as to allow the screw to revolve andrun down by its own gravity, and thus save the time and travel of the animal in running it down by the rotation of the nut; and it consists in connecting the screw with the follower by means of ratchet-head or collar on the former, and a pawl or trigger attached to the under side of the latter to engage with said ratchet-head during the operation of compressing the bale, and an intermediatewasher to save friction in its return, said pawl and ratchet being disconnected after the bale has been pressed and bound, to allow the screw, and with it the follower, to run down by their own gravity to their normal position while the animal is standing or-the drivingbelt is on the loose pulley, thus saving much time and labor, and simplifying the mechanical construction as heretofore patented.

I will now describe my improvement in detail by referring to the accompanying drawings, in which- Figure 1 represents an elevation of the screw and follower, partly in section. Fig. 2 is an inverted view of the follower, and Fig. 3 a top or face view of the ratchethead of the screw.

The same letters of reference occurring 011 the several figures indicate like parts.

A represents the pressscrew, which is preferably made with a double thread to acceler ate its gravitation through the nut in returning to its normal position.

The nut and draftbeam or gearing by which it is operated by animal, steam, or other power are constructed and supported the same as in any other press, (the patent of Ivens and Dorand, February 26, 1878, for inend of the screw-spindle A may be made flat or of inverted conical or concave shape, with a loose washer of flat, conical, or spherical form interposed in the recess 01 between it and the follower, thus reducing the friction be- .tween them. When their connection is broken by withdrawing the pawl O, the screw is allowed to rotate, and the follower resting on its top descends to its normal position.

If thought desirable, a plate or collar, e, may be used to engage with a groove in the head of the screw-spindle above the ratchethead and secured to the under side of the platen to prevent their becoming separated.

The pawl or trigger 0, having its fulcrum at m, has attached at its opposite end a cord, 01, chain, lever, or other suitable appliance, by which it may be withdrawn from its hold on the ratchet-head B after the bale has been bound, in which event the screw and follower will return to their normal position by their own gravity, the follower being guided in its descent by the baling-chamber or other suitable guides. The pawl 0 may be borne against the ratchet-head by a spring, f,- or it may be engaged therewith by hand, or by a suitable 1e ver, or by a cord.

What I claim herein as new, and desire to secure by Letters Patent, is-- The combination of the ratchet-head B, pawl O, and loose washer, the latter being either flat, conical, or spherical, as described, with the screw A and follower D, all arranged and operating substantially as and forthe pur pose set forth.

EDMUND M. IVENS.

Witnesses:

N. B. TRIsT, S. G. WILsoN. 

